Noxious Weeds

General Notice of Noxious Weeds


Notice is hereby given this 20th day of March, 2023 Pursuant to the Utah Noxious Weed Act, Section 7, to every person who owns or controls lands in Grand County, Utah, that noxious weeds standing, being, or growing on such land shall be controlled and the spread of same prevented by effective cutting, tillage, cropping, pasturing, or treating with chemicals or other methods, or combination methods, or combination thereof, approved by the County Weed Supervisor, as often as may be required to prevent the weed from blooming and maturing seeds, or spreading by root, root stalks or other means. 

            Upon failure to comply with this notice, the owner or persons in possession of property upon which noxious weeds are present shall be deemed negligent and enforced control measures may be imposed at the discretion of county authorities. Expenses of control measures employed by the county shall be paid directly by the owner or person in possession of the property or shall constitute a lien on the property and become collectible by taxes.

            The following are declared noxious weeds for the State of Utah and the County of Grand:

Class 1A EDRR

 Early Detection Rapid Response Watch List

Watch List Declared noxious and invasive weeds not native to the state of Utah and not known to exist in the State 

Common crupina – Crupina vulgaris
African rue – Peganum harmala
Small bugloss – Anchusa arvensis
Mediterranean sage – Salvia aethiopis
Spring millet – Milium vernale
Syrian beancaper – Zygophyllum fabago
Ventenata (North Africa grass) – Ventenata dubia
Plumeless thistle – Carduus acanthoides
Malta starthistle – Centaurea melitensis 


Class 1B EDRR 

Early Detection Rapid Response

Declared noxious and invasive weeds not native to the State of Utah that are known to exist in the state in very limited populations 

Camelthorn – Alhagi maurorum
Garlic mustard – Alliaria petiolata
Purple starthistle – Centaurea calcitrapa
Goatsrue – Galega officinalis
African mustard – Brassica tournefortii
Giant reed – Arundo donax
Japanese knotweed – Polygonum cuspidatum
Blueweed (Vipers bugloss) – Echium vulgare
Elongated mustard – Brassica elongata
Common St. Johnswort – Hypericum perforatum
Oxeye daisy – Leucanthemum vulgare
Cutleaf vipergrass – Scorzonera laciniata

Class 2: Control

Declared noxious and invasive weeds not native to the state of Utah that are known to exist in varying populations throughout the state. Class 2 species population concentrations are at levels where control or eradication may be possible. 

Leafy spurge – Euphorbia esula
Medusahead – Taeniatherum caput-medusae
Rush skeletonweed – Chondrilla juncea
Spotted knapweed – Centaurea stoebe
Purple loosestrife – Lythrum salicaria
Squarrose knapweed – Centaurea virgata
Dyers woad – Isatis tinctoria
Yellow starthistle – Centaurea solstitialis
Yellow toadflax – Linaria vulgaris
Diffuse knapweed – Centaurea diffusa
Black henbane – Hyoscyamus niger
Dalmatian toadflax – Linaria dalmatica 

Class 3: Contain

Declared noxious and invasive weeds not native to the State of Utah that are widely spread. Class 3 species are known to exist in various populations throughout the state. Weed control efforts may be directed at reducing or eliminating new or expanding weed populations.

Russian knapweed – Acroptilon repens
Houndstongue – Cynoglossum officianale
Perennial pepperweed (Tall whitetop) – Lepidium latifolium 
Phragmites (Common reed) – Phragmites australis ssp.
Tamarisk (Saltcedar) – Tamarix ramosissima
Hoary cress – Cardaria spp.
Canada thistle – Cirsium arvense
Poison hemlock – Conium maculatum
Musk thistle – Carduus nutans
Quackgrass – Elymus repens
Jointed goatgrass – Aegilops cylindrica
Bermudagrass* – Cynodon dactylon
Perennial Sorghum spp.: Johnson Grass (Sorghum halepense) and Sorghum almum (Sorghum almum).
Scotch thistle (Cotton thistle) – Onopordum acanthium
Field bindweed (Wild Morning-glory) – Convolvulus spp.
Puncturevine (Goathead) – Tribulus terrestris

Class 4: Prohibited

Declared noxious and invasive weeds, not native to the state of Utah, that pose a threat through  retail sale or propagation in the nursery and greenhouse industry.

Cogongrass (Japanese blood grass) – Imperata cylindrica
Myrtle spurge – Euphorbia myrsinites
Dames Rocket – Hesperis matronalis
Scotch broom – Cytisus scoparius
Russian olive – Elaeagnus angustifolia

Grand County Class 4: Prohibited

Declared noxious and invasive weeds, not native to the state of Utah, that pose a threat through retail sale or propagation in the nursery and greenhouse industry.

Ravenna grass - Tripidum ravennae (previously Saccharum ravennae)


*Bermudagrass shall not be a noxious weed in Washington County and shall not be subject to provisions of the Utah Noxious Weed Act within the boundaries of the county. 

Noxious Weeds Known to be in Grand County

This is not an exhaustive list of all species found in Grand County - photos will be updated soon

Class 1A EDRR

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Class 1B EDRR

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Class 2 Control

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Class 4 Prohibited

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Class 3 Contain

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